Carl Icahn hints at 'interesting' new letter to Apple CEO Tim Cook

Activist investor Carl Icahn has taken to Twitter to hint at an “interesting” open letter addressed to Apple CEO Tim Cook. “Tmrw we’ll be sending an open letter to @tim_cook. Believe it will be interesting,” one post reads. In another, he comments about his firm’s large stake in Apple and recent share performance. “Just over 1yr ago we tweeted our large position in $AAPL & belief the company extremely undervalued. Since then, stock is up 50.6 percent.”…